2. Найдите значение выражения: a) 11/50 - 3/25 + 1/20; б) 8 - 3 6/7; в) 2 1/8 + 3 5/12; г) 5 13/15 + 1 7/12; д) 7 3/8 - 3 5/6.

a) 11/50 - 3/25 + 1/20 = 22/100 - 12/100 + 5/100 = 15/100 = 3/20 = 0,15 б) 8 - 3 6/7 = 7 7/7 - 3 6/7 = 4 1/7 в) 2 1/8 + 3 5/12 = 2 3/24 + 3 10/24 = 5 13/24 г) 5 13/15 + 1 7/12 = 5 52/60 + 1 35/60 = 6 87/60 = 7 27/60 = 7 9/20 д) 7 3/8 - 3 5/6 = 7 9/24 - 3 20/24 = 6 33/24 - 3 20/24 = 3 13/24